针对激光引信常用的恒比定时时刻鉴别法的饱和漂移误差问题, 提出了一种前沿判别与恒比定时复合的时刻鉴别方法及其误差补偿模型。建立了恒比定时时刻鉴别的漂移误差模型, 分析了饱和漂移误差随回波信号理论峰值电压的变化规律; 提出了基于复合时刻鉴别法的漂移误差补偿方法, 建立了复合时刻鉴别的漂移误差补偿数学模型, 得到了修正的脉冲激光测距公式, 并进行了测距精度验证实验。结果表明, 复合时刻鉴别及误差补偿修正方法可有效减小系统误差, 测距精度可控制在±0.3 m以内。

Aiming at the saturation drift error occurring in the identification method of the constant ratio timing which is commonly used in laser fuze, an identification method of the composite moment between the front edge discrimination and the constant ratio timing and its error compensation model are proposed. The drift error model for the identification of the constant ratio timing is established and the variation law of the saturation drift error with the theoretical peak voltage of echo signals is analyzed. The compensation method of drift errors based on the composite moment identification method is proposed, and a mathematical model for compensating drift errors in the identification of the composite moment is established. The modified pulsed laser ranging formula is obtained and the verification experiment of the measurement precision is carried out. The results show that, the system errors can be effectively reduced by the composite moment identification and the error compensation correction methods and the ranging precision can be controlled within ±0.3 m or less.